Winter apples are a type of apple that is harvested in the winter months. The three most popular varieties of winter apples are Winesap, RUSSET, and Rome. Winesap apples are tart and firm with a sweet-tart flavor. RUSSET apples are large, brown-skinned apples with a sweet, nutty flavor. Rome apples are tart and juicy with a firm texture. All three varieties of winter apples are great for baking, cooking, and eating fresh.